[PATCH 2/3] pwclient: use print_function for better py3 compatibility

[Finucane, Stephen]

> > From: Mike Frysinger <vapier at chromium.org>
> >
> > The script already tries to use print like a function in many places but
> > is really passing a parenthesized string.  Import the print_function from
> > the future module so that it actually works as intended.
> >
> > We also need to fix up a few latent print statements to make it work.
> >
> > Signed-off-by: Mike Frysinger <vapier at chromium.org>
> 
> Lovely work.
> 
> Reviewed-by: Stephen Finucane <stephen.finucane at intel.com>

Merged.